/* * ncm.c -- NCM gadget driver * * Copyright (C) 2010 Nokia Corporation * Contact: Yauheni Kaliuta * * The driver borrows from ether.c which is: * * Copyright (C) 2003-2005,2008 David Brownell * Copyright (C) 2003-2004 Robert Schwebel, Benedikt Spranger * Copyright (C) 2008 Nokia Corporation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. */ /* #define DEBUG */ /* #define VERBOSE_DEBUG */ #include #include #include #include "u_ether.h" #include "u_ncm.h" #define DRIVER_DESC "NCM Gadget" /*-------------------------------------------------------------------------*/ /* DO NOT REUSE THESE IDs with a protocol-incompatible driver!! Ever!! * Instead: allocate your own, using normal USB-IF procedures. */ /* Thanks to NetChip Technologies for donating this product ID. * It's for devices with only CDC Ethernet configurations. */ #define CDC_VENDOR_NUM 0x0525 /* NetChip */ #define CDC_PRODUCT_NUM 0xa4a1 /* Linux-USB Ethernet Gadget */ /*-------------------------------------------------------------------------*/ USB_GADGET_COMPOSITE_OPTIONS(); USB_ETHERNET_MODULE_PARAMETERS(); static struct usb_device_descriptor device_desc = { .bLength = sizeof device_desc, .bDescriptorType = USB_DT_DEVICE, /* .bcdUSB = DYNAMIC */ .bDeviceClass = USB_CLASS_COMM, .bDeviceSubClass = 0, .bDeviceProtocol = 0, /* .bMaxPacketSize0 = f(hardware) */ /* Vendor and product id defaults change according to what configs * we support. (As does bNumConfigurations.) These values can * also be overridden by module parameters. */ .idVendor = cpu_to_le16 (CDC_VENDOR_NUM), .idProduct = cpu_to_le16 (CDC_PRODUCT_NUM), /* .bcdDevice = f(hardware) */ /* .iManufacturer = DYNAMIC */ /* .iProduct = DYNAMIC */ /* NO SERIAL NUMBER */ .bNumConfigurations = 1, }; static const struct usb_descriptor_header *otg_desc[2]; /* string IDs are assigned dynamically */ static struct usb_string strings_dev[] = { [USB_GADGET_MANUFACTURER_IDX].s = "", [USB_GADGET_PRODUCT_IDX].s = DRIVER_DESC, [USB_GADGET_SERIAL_IDX].s = "", { } /* end of list */ }; static struct usb_gadget_strings stringtab_dev = { .language = 0x0409, /* en-us */ .strings = strings_dev, }; static struct usb_gadget_strings *dev_strings[] = { &stringtab_dev, NULL, }; static struct usb_function_instance *f_ncm_inst; static struct usb_function *f_ncm; /*-------------------------------------------------------------------------*/ static int ncm_do_config(struct usb_configuration *c) { int status; /* FIXME alloc iConfiguration string, set it in c->strings */ if (gadget_is_otg(c->cdev->gadget)) { c->descriptors = otg_desc; c->bmAttributes |= USB_CONFIG_ATT_WAKEUP; } f_ncm = usb_get_function(f_ncm_inst); if (IS_ERR(f_ncm)) { status = PTR_ERR(f_ncm); return status; } status = usb_add_function(c, f_ncm); if (status < 0) { usb_put_function(f_ncm); return status; } return 0; } static struct usb_configuration ncm_config_driver = { /* .label = f(hardware) */ .label = "CDC Ethernet (NCM)", .bConfigurationValue = 1, /* .iConfiguration = DYNAMIC */ .bmAttributes = USB_CONFIG_ATT_SELFPOWER, }; /*-------------------------------------------------------------------------*/ static int gncm_bind(struct usb_composite_dev *cdev) { struct usb_gadget *gadget = cdev->gadget; struct f_ncm_opts *ncm_opts; int status; f_ncm_inst = usb_get_function_instance("ncm"); if (IS_ERR(f_ncm_inst)) return PTR_ERR(f_ncm_inst); ncm_opts = container_of(f_ncm_inst, struct f_ncm_opts, func_inst); gether_set_qmult(ncm_opts->net, qmult); if (!gether_set_host_addr(ncm_opts->net, host_addr)) pr_info("using host ethernet address: %s", host_addr); if (!gether_set_dev_addr(ncm_opts->net, dev_addr)) pr_info("using self ethernet address: %s", dev_addr); /* Allocate string descriptor numbers ... note that string * contents can be overridden by the composite_dev glue. */ status = usb_string_ids_tab(cdev, strings_dev); if (status < 0) goto fail; device_desc.iManufacturer = strings_dev[USB_GADGET_MANUFACTURER_IDX].id; device_desc.iProduct = strings_dev[USB_GADGET_PRODUCT_IDX].id; if (gadget_is_otg(gadget) && !otg_desc[0]) { struct usb_descriptor_header *usb_desc; usb_desc = usb_otg_descriptor_alloc(gadget); if (!usb_desc) goto fail; usb_otg_descriptor_init(gadget, usb_desc); otg_desc[0] = usb_desc; otg_desc[1] = NULL; } status = usb_add_config(cdev, &ncm_config_driver, ncm_do_config); if (status < 0) goto fail1; usb_composite_overwrite_options(cdev, &coverwrite); dev_info(&gadget->dev, "%s\n", DRIVER_DESC); return 0; fail1: kfree(otg_desc[0]); otg_desc[0] = NULL; fail: usb_put_function_instance(f_ncm_inst); return status; } static int gncm_unbind(struct usb_composite_dev *cdev) { if (!IS_ERR_OR_NULL(f_ncm)) usb_put_function(f_ncm); if (!IS_ERR_OR_NULL(f_ncm_inst)) usb_put_function_instance(f_ncm_inst); kfree(otg_desc[0]); otg_desc[0] = NULL; return 0; } static struct usb_composite_driver ncm_driver = { .name = "g_ncm", .dev = &device_desc, .strings = dev_strings, .max_speed = USB_SPEED_HIGH, .bind = gncm_bind, .unbind = gncm_unbind, }; module_usb_composite_driver(ncm_driver); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_AUTHOR("Yauheni Kaliuta"); MODULE_LICENSE("GPL"); ubs.c parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'sound/soc/codecs/wm_hubs.c')